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onewatt · 26th Mar 2016, 1:20 pm

Hi group,
Is anyone familiar with the above siggen? I have downloaded the manual but the power unit appears to be different from the circuit included with the manual. the PU is a Coutant lambda HVI-60-47A.
I have Vy low supplies and the transformer output is being held down. If I remove the diode arrays and regulators the tx supply comes back up and the tx doesnt get hot at any time, although its getting warmer now there's some voltage on its output. I've checked all the diodes and caps in the out train and all appear good. the 1st diode array ia a bit of a strange one and i've not been able to track a data sheet, its a C8275 and under diode test gives 0.2 across each diode, but given both are the same I'm assuming its ok.
Advice sought please.

Regards
Chris

26th Mar 2016, 1:20 pm	#1
onewatt Hexode Join Date: Jun 2005 Location: Buntingford, Hertfordshire, UK. Posts: 362	Marconi 2024 SGen SMPS faulty Hi group, Is anyone familiar with the above siggen? I have downloaded the manual but the power unit appears to be different from the circuit included with the manual. the PU is a Coutant lambda HVI-60-47A. I have Vy low supplies and the transformer output is being held down. If I remove the diode arrays and regulators the tx supply comes back up and the tx doesnt get hot at any time, although its getting warmer now there's some voltage on its output. I've checked all the diodes and caps in the out train and all appear good. the 1st diode array ia a bit of a strange one and i've not been able to track a data sheet, its a C8275 and under diode test gives 0.2 across each diode, but given both are the same I'm assuming its ok. Advice sought please. Regards Chris Attached Thumbnails __________________ BVWS, VMARS, RSGB, DEHS, RAOTA Nothings too big or too heavy, otherwise it wouldn't be where it is!